Grinding-machine.



'Nog/211,636. I PATBN'TBD PEB. 24, 19.03,I I.. BASSIMIORB.` a 'I-.IJrRI-NDINGr IIAGHIIIIL APPLICATION FILED ngmiplsijo.-

l I I I.

THE NDRRIS PETERS La. PHOTILLITHD.. WASHINGTON, u. c.

UNITED STATES PATENT `OFFICE.

LEVIS PASSMoEE,.oE PHILADELPHIA,PENNSYLVANIA, ASSIeNoR To KATE s.PASSMoRn or PHILADELPHIA, PENNSYLVANIA.

GRINDING-MACHINE.

SPECIFICATION foi-Ising' part of Lettere; Patent' No. 721,636,datearebmary 24, 1 eos. Appiicttitn tied December 4, 1902. senti No;133,827; (No'moaei.)

To all wtont t may concern:

ABe it known thatl I, LEVIS PAssMoRE, of the city and county ofPhiladelphia, State of Pennsylvania,haveinvented an Improvement inGrinding-Machines, of which the following is a specification. l

My invention has reference to grinding-machines; and it consists ofcertain improvements which are fully set forth in the followingspecification and shown in the accompanying drawings, which form a partthereof.

The object of my invention is to provide a simple and inexpensiveconstruction espeoially adapted for emery and other grindingmachines inwhich the grinding element is required to be revolved at a high speed.

More particularly my invention has for its objects the employment of aconstruction which Will overcome any tendency of the grinding-Wheel torevolve out-of true alinement and to accomplish this result in aninexpensive manner, so that the various grinding-machines in a `Worksmay be installed 'as independent elements, each one running at its ownrequired speed.

In carrying out my invention I provide a pedestal with a iixedhorizontal bearinghav ing a conical portion, and combined therewith Iemploy a bearing furnished with al band- Wheel and a clamping part forthe emery or other grinding wheel. In connection with the above featuresI also employ a suitable adjusting device for the support of the grindstone or Wheel at its extreme outer end with capacity of adjustment tocompensate for Wear for the purpose of steadying the operation of thegrind stone or Wheel during rotation. I further prefer to employ `'aspecial means of oiling, comprehending the provision of an oil-well inthe pedestal communicating by means of a duct-to the conical bearing,the regulation of the oil being preferably secured by a packing ofcotton orother soft material held in position by an adjustable glandrevolving with the bearing and pulley.

My invention also comprehends other details of construction, which,together with the above features, will be better understood by referenceto the drawings, in Which- Figure lis a. longitudinal sectionalelevation of an emery grinding-machinev embody- The objection to this isits expense, liability` to wear, lack of adjustment, and the operationof two emery-wheels of dierent diameters and adapted for different Workat the same speeds. most inevitable resultof using machines of thecharacter at present in use,because manufacturers invariably employemery-Wheels of dierent diameters upon the two ends of the spindle. Inmyinvention only one emery- Wheel is employed with any one machine, andthis is so combined with the supporting-spindle that all wear is readilytaken up, so that the Wheel runs Very true, and hence overcomes theliability of accidental rupture of the Wheel and the consequent dangerto the operator of being struck by the flying pieces. Referring morespecifically to the construction illustrated, A is the pedestal, adaptedto be bolted upon any support,such as a bench. Fitted to this pedestalis a fixed shaft B, the same being secured in position by a tapered buttC, adj ustedV toa corresponding aperture in thev pedestal and drawn intorigid connection by a slot and key D. The projecting part of thejshaft Bnext to the pedestal Ais made conical, as at E, and the extreme end I F,which is within the grinding-wheel proper,

is made of uniform diameter or cylindrical. Journaled upon the conicalbearing part Eis asleeve G, constituting a bearing-s-urface, which isbabbitted, as-at g. This conical sleeve G is secured at the outer endtoa vertical ange or disk H, to which is also secured a pulley-ange I.This construction constitutes, in effect, a pulley journaled upon theconical bearingE and having the vertical flange H. The annularemery-Wheel R is This latter diiculty is the alclamped between the angeH and an outer disk P by means of bolts Q, and said disk is looselyjournaled upon the cylindrical part F of the shaft B. The annularemery-Wheel is centralized in the flangeH and the diskP by means of theannular'projecting flanges or lugs p. The center portion of the disk Pis IOS provided with an outwardly-directed annular recess S, which isfilled with packing T, such as cotton and plumbago. This makes a tightpacking and is clamped in said recesses S by a cylindrical flange U,forced inward under the action of a nutW, screwed upon the end of theshaft B. By means of this nut WV the conical sleeve G may be adjustedupon the conical bearingEof the shaft B, so as to compensate for allwear, and any slight wear which may come upon the central part of thedisk P will be taken up by the packing T therein, so that the said diskis steadied upon the outer end of the shaft B.

To secure proper oiling of the bearing E, I employ the followingconstruction: The pedestalAis made with an oil-chamber N, adapted toreceive oil. The oil may iiow from this chamber through a small apertureO into a space between the face of the pedestal and the end of theconical sleeve G, and it is preferably received by a packing of cottonor other absorbent material M. This absorbent material is retained inposition by means of an adjustable gland K, which telescopes thepulley-hub G and is pressed outward by a spring L, contained within thechamber J, between the pulley-ange and the conical bearing part or hubG. In this manner the outer end of the gland K revolves against thesurface of the pedestal and confines the absorbent packing M and oil.The oil receive'd by the packing M slowly works its way into a groove V,extending along the upper surface of the conical bearing E, and isthereby delivered throughout the length of said bearing. It will be seenthat by this construction a very positive and accurate bearing for therevolving emery grind-wheel is secured, and the strain of the belt uponthe wheel is directly above the bushing, so as to make the wear asuniform as possible. No appreciable wear comes upon the disk P, the saidpart being designed for the purpose of clamping the emery-wheel inposition and steadying it at the outer end, as Well as holding the partG in position upon its shaft, and therefore I do not confine myself tothe particular construction of this part, as it is evident that it maybe very materially modified.

Vhile I prefer the construction shown, I do not confine myself to theminor details, as they may be varied within reasonable conditionswitliout departing from the spirit of the invention.

Having now described the nature of my invention, what I claim as new,and desire to secure by Letters Patent, is-

I. In a grinding-machine, the combination of a pedestal or base, alaterally-extending fixed shaft having a conical portion, a pulleyhaving a conical bearing fitting said shaft, a grinding-wheel secured toand rotating with the pulley, and means for holding the pulleybearing inposition upon the shaft.

2. In a grinding-machine, the combination of a pedestal or base, alaterally-extending fixed shaft having a conical portion, a pulleyhaving a conical bearing fitting said shaft, a sleeve carried by thepulley and pressing against the pedestal to form an annular chamberbetween it and the shaft, absorbent packing arranged in said annularchamber for containing oil, a grinding-wheel secured to and rotatingwith the pulley, and means for holding the pulley-bearing in positionupon the shaft. i

3. In a grinding-machine, the combination of a pedestal or base havingan oil-well, a laterally-extending fixed shaft having a conical portion,a pulley having a conical bearing fitting said shaft, a sleeve carriedby the pulley and pressing against the pedestal' to form an annularchamber between it and the shaft, absorbent packing arranged in saidannular chamber, means for supplying oil to said chamber from theoil-well in the pedestal, a grinding-wheel secured to and rotating withthe pulley, and means for holding the pulleybearing in position upon theshaft.

4.-. In a grinding-machine, the combination of a pedestal or base, alaterally-extending fixed shaft having a conical portion, a pulleyhaving a conical bearing tting said shaft, a sleeve carried by thepulley and pressing against the pedestal to form an annular chamberbetween it and the shaft, a spring carried by the pulley for forcingsaid sleeve against the pedestal with an elastic pressure,absorb entpacking arranged in said annular chamber, means for supplying oil tosaid chamber, a grinding-wheel secured to and rotating with the pulley,and means for holding the pulley-bearing in position upon the shaft.

5. In a grinding-machine, the combination of a pedestal or base, alaterally-extending fixed shaft having a conical portion, a pulleyhaving a conical bearing fitting said shaft, a grinding-wheel secured toand rotating with the pulley, and means for holding the pulleybearing inposition upon the shaft consisting of an adjustable nut screwed upon theend of the fixed shaft.

6. In a grinding-machine, the combination of a pedestal or base, alaterally-extending fixed shaft having a conical portion, a pulleyhaving a conical bearing fitting said shaft, a grinding-wheel secured toand rotating with the pulley, an outer disk secured to the pulley andgrinding-wheel journaled upon the shaft and having a central recess, apacking in the recess, means for compressing the packing of the recessupon the shaft, and means for holding the pulley-bearing in positionupon the shaft.

7. In a grinding-machine, the combination of a pedestal or base, alaterally-extending fixed shaft having a conical portion, a pulleyhaving a conical bearing fitting said shaft, a grinding-wheel secured toand rotating with the pulley, and means for adjusting the pulley-bearinglongitudinally upon the shaft to compensate for wear.

8. In a grinding-machine, the combination meV IIO

of a pedestal or base, a laterally-extending fixed shaft having aconical portion adjacent to the pedestal and a cylindrical end, a pulleyhaving a conical bearing adapted to the conical portion of the shaft andalso having a vertical flange, a disk jourualed upon the cylindricalportion of the shaft, an annular grinding-Wheel clamped in positionbetween the flange and disk, clamping-bolts for holding the flange anddisk upon the Wheel, and means secured upon the end of the shaft forholding the pulley upon its conical bearing.

9. In a grinding-machine, the combination of a pedestal or base, alaterally-extending fixed shaft having a conical portion adjacentl tothe pedestal and a cylindrical end, a pulley having a conical bearingadapted to the conical portion of the shaft and also having a verticalflange, a disk journaled upon the cylindrical portion of the'shaft, anannular grinding-wheel clamped in position between the flange and disk,clamping-bolts for hold shaft for holding the pulley upon its conicalbearing andthe packing in expandedxcondition.

In testimony of which invention I have 3o hereunto set my hand. y

LEVIS PASSMORE.

Witnesses:

ERNEST HOWARD HUNTER, R. M. KELLY.

